Deep-well pump



J. HAHN. DEEP WELL PUMP. APPLICATION man APR. I. |919 Patented May 24, 19

2 SHETSSHEET A. Inni-1.0M. IIVIIA.

J. HAHNx DEEP WELL PUMP. APPLICATION mio fwn. L my.

A gs Y lll S""" f r JOHN HAHN, 0F LOS ANGELES, CALIFORNIA.

DEEP-WELL PUMP.

Specification of Letters Patent.'

Patented May ai. 192i.

Application filedY April 1, 1919. Serial No. 286,681.

T o all fwltofm. t may concern:

Be it known that I, JOHN HAHN, a citizen of the United States, residing at Los Angeles, in the county ot Los Angeles -and btate of California, have invented a. new and useful Deep-lVell Pump, of which the ollowingis aspecilicationt This invention pertains to pumps used 1n pumping liquids from wells., and is especially suited to working in comparatively deep wells for pumping oil therefrom.

An object ot the invention is to so construct the pump that the gas in the oil well will not interfere with the eiicient action of the pump.

Another object is to so construct the pump that sanding thereof will not be liable.

Tn some of the California oil wells, not

only is great depth of the well attained in many instances, but a largeamount of sand must be contended with in the pumping operation. Oil wells produce more or less natural gas and this gas interferes with the closing of the valves in the pumps heretofore in use, so that on the delivery stroke of the pump much of the oil that would be delivered` if the valves would properly seat, is allowed to escape past the plunger and there for the maximum efiiciency ofthe pump is not attained. A

Another object is to provide a construction whereby the conduit is detachably seated and may be readily withdrawn from the well with the plunger.

Another object is to make provision for lthe entrance ot oil to the plunger above the standing valve on the upstroke ot the plunger so as to hold the standing valve closed and subinerge the standing valves and lower plunger valve in the liquid being pumped.

Other objects and advantages will 'appear in the subjoined detailed description.

The accompanying drawings illustrate the invention:

Figure 1 is a side elevation, partly in vertical mid vsection of a pump constructed in accordance with the provisions of this invention, a portion of the sand trap being broken away to contract the view.

Fig. 2 is an enlarged sectional elevation of the 11p/per portion of the pump shown in Fig. 3 is aiienlarged sectional elevation of the intermediate portion of the pump.

Fig. 4 is an enlarged sectional elevation o t 'the lower portion ot the pump.

Fig. 5 is a plan section on line indicated Fig. 6 is a plan section on line indicated by .r6-4x6,- Fig. 3.

Fig. 7 is an enlargedsectional elevation of the upper portion ot Fig. 2.

Fig. 81s an'inverted plan section on line indicated by v9-w08, Fig. 7.

Fig. 9 is a plan section on line indicated by afb-Q29, Fig. 7.

Fig. 10 isia side elevation of the upper plunger barrel or guide.

Fig. 11 is an enlarged sectional elevation or" the upper portion of Fig. 4.

Fig. 12 is a plan section on line indicated by x12-0212, Fig. 11.

There is provided a lower seat member 1 having a downwardly and inwardly tapered seat 2 to receive and frictionally hold a seat member in the form of a downwardly and inwardly tapered solid plug 3 which is pret# erably of non-magnetizable metal and which is screw-threaded into the lower end ot an innerl sand trap tube 4 extending through and spaced from an external sand trap tube 5 that i'n turn is screw-threaded at its lower ehd into the seat member 1 above the seat 2. The lower'end of the seat member 1, if desired, may be provided with internal screw threads 6 adapted to engage the upper end of a tube catcher, not shown, of any suitable construction. The seat member 1, plug 3 and tubes 4 and 5 constitute a sand trap, and the inner trap tube fl is provided with perforations 7 to afford communication between the inner and outer tubes so that sand and liquid may pass into the outer tube.

The upper end ot the tube 5 is screwthreaded into a seat member 8 which is provided with a downwardly and inwardly tapered seat- 9 adapted to lit a downwardly and inwardly tapered annular seat member 10 that slidably fits on a perforated lower conduit tube 11, said perforations or ports being indicated at 12. The upper end of the tube 11 is screw-threaded into, or otherwise attached to, a lower valve cage. 13 provided with the usual ball valve 14 and seat 14 to control the flow of' liquid upward through said valve cage. The 'cage 13,' ball valve 14.

and seat 14 constitute the lower standing valve of the pump. This valve cage 13 has forms an abutment for theupper end of a a. solid peripheralwall and saidcage also;

l so as to tend to :inst the est member 11 Tl rightly in place sind the Cage 1T, institute 'the nphe pump The valve ine. hollow plunger the Conduit tube 1G with ports 2l. The enter inside diameter f il M or the Conduit torni spose for packing by the nl. The vulve onge 17 iry piston heed the lower end oi is sorewethreaded or to un annular tip 21 -loly and slidall lits the conduit le, as to for@ u su nnle parking for langer tube if) to elose :annular spore between in e plunger tube 19.

s provided with ports W, said ports being so positioned that when e-e oud. ot its down stroke the plunger is nl; i.-

tube

the `lower end of the he lower en@ of tie l l i ine comin t tub the ports will communicate with the interior or the plunger shove the tip 21 and when the plunger reised a short distance the ports will communicate with the space -i J shown in Fig. 5, The s n3 is provided with the usual ball und jseat 21. The cage ball ai". 24e constitute the lower "l" ie apex' end of the valve i led or otherwise conplunger tube which is than the lower plunger i screw-*threaded or i upper end to e r 26, peripheral wall of said solid as clearly shown in lower plunger tube 19, valve u fer plunger tube 25 together plunger. The vulve cage 26 :ne usuel ball valve 2i' and d the bull valve 27. und iute the. upper plunger vulve the upper e form of a which is pro- "-:ilv and inA @idly und inwardly tapered sent 3U ot a tubular seat member 31. The seat member Ill 1s provided ut its lower end with guides in the forni of peripherally extending;` lugs 32, andy reservoir 3l as said gas collects in the upper portion thereof. The ports 3G i'neterably extend aslunt upwardly und outwardly.

rlhe reservoir Bel is srrew-thremled or otherwise eouneoted at its lower end to a 1'ii}' plei`or1`ningy portion lh oi' the lower end of u workin;r barrel 3T, the upper end of whieh, in this instance, is substuntiallyY on u level with the valve cage 1l'. The plunger tube l) slidabliv lits in the working burrel 3T. The lower end of the working barrel 3T forms a liquid admission Chamber 38 which is provided with ports 3i, said admission chamber extending substantially from the vulve enge 13 to the sent member S to which the working borrel is s re\\'-tl1reuded or otherwise connected nt its lower end. rlhe working' borrel 37 is of less outside diameter than the inside diameter of the reservoir 34 so that liquid enteringr the ports 35 can pass down 'ardly through the reservoir and around the working barrel to the ports 39. The upper end of the working barrel 37 may be provided with guides in the form of radially extending' lugs 37 to hold the upper end ot' the working barrel central of the reservoir 34.

The parts thus ar described constitute the pump7 and the seat member 31 is adapted to be eonneeted at its upper end by a, coupling l0 to the pump tubing indicated :it fil. rlhe valve cage 26 is provided with a screwthreuded pin 42 for connection with the usual sucker line or rod, not shown.

The pump operates us follows: Assuming that the plunger is at the end of its down stroke and that the vulves ere all closed as shown in the drawings, the plunger will be moved upwardly on its suc-tion stroke and will therefore tend to create n partial vacuum in that portion of the barrel 37 below the plunger. As the plunger tip 21 rises it uncovers `the ports 22 so that the snotion effect will also take place, in the con duit 1G and thus cause the ball vulve 14 to open. The oil, or other liquid, which has flowed into the. chamber 38 through the per- 'forations 3S). as above described, will flow through the ports 12 into the tube 11, thence. iuiriarrlljyv through thevulve enge 13 into the ronduit. 1G, This upward movement of the plunger also Causes a suction eliect in the r tube 19 above the vulve 18 and con lll() sequently the valve 18 will open so as to allow the oil or other liquid to iow upn wardly from the, conduit 16 through the valve cage 17 into the plunger tube 19.

It will be noted that on the upward stroke of the plunger, as soon as the ports 2Q pass the valve cage 17, liquid and gas will liow from the reservoir 34 through the ports ,the level of the ports 35 thus forcing the gases past the valve 27 so vthat said gases can flow upward in the pump tubing while the plunger is making its suction stroke.

The'inlow of oil into the pump takes piace until the plunger reaches the end of its up stroke. The plunger now starts on its .down stroke and the pressure exerted by the liquid'in the plunger tube 19 on the valve 18 will maintain the valve 18 in closed position and will cause the valve 24 to open to allow liquid to How from the plunger tube 19 through the valve cage 23 into the upper plunger tube 25. The pressure of the liquid in the tube 25 will raise the valve 27 and consequently said liquid will iow from the tube 25 through the Valve cage 26 into the pump tubing 11 and thence to the surface of the earth where it discharges in a manner well understood in the pumping art. When the punger reaches the end of its .down stroke it again starts on its up stroke [and the above described operations are repea-ted as long as the plunger is reciprocated.

During the pumping of oil gases that flow into. the well with the oil tend to seek escape through the pump and ordinarily cause inveilicient working of the pump since they vtend -to hold the pump valves open and thus cause leakage of not onlylgas but oil past the valves of the plunger when said valves should be in closed position. By the constructionabove described the upper plunger tube 25 .forms a gas chamber into which the gas can flow from the plunger tube 19 so that on the up or suction stroke of the plunger `the pump will be relieved of gases which otherwise would prevent closing of the valve 18 on the down stroke of the plunger since the gases-would tend to keep the liquid away from the valve.

" @n the down strnke of the sucker rods, the plunger with its lower valve cage will descend freely through the liquid in the reservoir wtlioutagtating the liquid therein aid without causing any `strain on the sucker rods and plunger. On this down stroke the column of liquid inthe plunger and conduit remains stationary and the plunger tele scopes over the conduit and the liquid passes the valve 24 and fills the tube 25.- The valve 27 remains closed. being so held by the column of liquid on top of it.

The instant the'up stroke of the plunger begins, the standing valves will open aud the space. between the valves 2-1 and l-t gradually increases-and into this space the liquid will How `from the reservoir so as to be delivered into the space between the standing valve 14 and plunger 'valve 24. At the moment the down stroke of the plunger begins, the standing valves close, thus overcoming any tendency to fluctuation in the loading of the upper plunger chamber with liquid. ln thevpump described the plunger works through a liquid-tight sealing barrel slidably engaging the plunger between the plunger valvecages, thus preventing the back flow of liquid to the reservoir, below the pump tubing. The gases in the liquid in the reservoir freelyescape therefrom and therefore will not interfere with proper seating of the valves. but said gases will accumulate between the two plunger valves and, on the down stroke of the plunger, will be forced together with the upwardly moving liquids past the upper plunger valve into the pump tubing; and the `liquid will fiow freely through the reservoir ports into said reservoir and from thence into the plunger. Then liquid thus iowing into the pump will not be violently agitated and emnlsiied, and hence the plunger can effectively elevate the liquid and will not be merely vrkingl against a body of foamy emulsified liquid which would result if the liquid were 'violently agitated. The working parts of this type of pump are at all times submerged in the ascending liquids, without there being alny gas filled spaces, iand therefore the valves will operate quicker, and Vin consequence of `this the plunger vcan be operated at a much higher speed than in those pumps in which gas interferes with 'the quick closing of the valves.

From the foregoing it is clear that the essential element-s for producing the result noted are a conduit with at least one standing'valve, a. tubular vplunger fitting the outside of the conduit and working through the liquid body,` andreceiving and discharge valves forthe plunger.

' If sand should enter the well with the oil and pass through the ports 39 into the chamber 38, thence into the tube 11 through the ports 12, said sand wili settle into the tube 4; of the sand 'trap'.l

It. to renew the valves or for any other reason, it becomes desirable. to withdraw the conduit and its c Ylvfgfrom .the well,

| llt) ibis may he done b v raising the plunger higher than in the normal working stroke of the plunger so as to cause an internal shoulder 4&3. toi-med b v the upper end of the tip 21. to engage an external shoulder 14C on the ronduit. said external shoulder being formed by the lower end of the valve rage 1T. Further upward movement of the plunger raises the valve cage 1T and with it the conduit tube lt so as to litt the valve Cage lil and tube 1l. Raising ot' the tube ll in this wise causes an external shoulder 45 ot' said tube to engage the valve seat 10 so as to raise said valve seat against the pressure ol' the spring 15 out ot the seat member t4. the shoulder l5 in this instance being i'ormed by the upper end ot' the tube 4..

This upward movement ot' the tube l pullsl the plug i3 Afrom the seat member l. and Sand and liquid which ma;VY have passed trom the tube l through `the ports T into the tube 5 will discharge from the tube 5 through the seat member l. In the upward movement of the plunger to thus withdraw the same, an external shoulder -lt on the plunger engages the lower end ot the barrel 28 s0 as to disengage said barrel from the seat member 31 and thus cause said barrel to be elevated with the plunger. The shoulder 46 is formed in this instance, b v the upper end of the valve cage 23.

To return the pump plunger and the parts attached thereto to their positions in the well. the plunger` with the parts associated therewith is lower ed into the well until the seat 10 rests upon the seat 9 of the seat member S. The. plunger will then be lowered farther to cause the plu' ger tip 2l to strike the valve cage 13 so a to drive said valve cage 13 downwardly and compress the spring 15 suiciently to allow the plug 3 to engage the seat 2 ot' the seat member 1. Thus the spring 15 yieldingly holds the seat member l() within the seat member 8 and permits relativev adjustment between the plug 3 and seat member 10 so that when the seat member it) is securely seated in the seat member 8 the plug 3 will also be tightly seated in the seat member 1. The lower end of the valve cage 26 formsan external shoulder 1T on the plunger 25 so that when the plunger is moved'downwardly the shoulder 47 will be brought into engagement with a yielding member in the form of a coil spring 49 resting on thtI upper end of the barrel 28, in order to force said barrel rmly into the seat member 31..

It is understood that the constructor may omit either the sand trap or the working barrel 37 or both sand trap and working barrel. It is preferable to omit the working barrel in eventY of the well having an unusually large amount of sand or detritus which would tend to plug up the ports 39. It the Working barrel be omitted the liquid will flow directly from the reservoirthrough the ports 12 into the tube 1l., or, in event ot the tube 11 becoming sanded, the liquid will flow into the plunger tube 19 through the ports 20. thence through the ports 22 into the upper conduit tube 1G. or, in event of the ports 22 and cage 17 being sanded, the liquid will enter the plunger tube 19 above the valve cage 1T. when the plunger is raised to bring the ports 20 above the level ot the 'alve cage li'.

The valve cage 26 is tubular and is provided with stops 50 in its bore to limit upward movement of the ball valve 2. Also the cage 2G is provided at its upper end above the stops 50 with a wedgeshaped or downwardl)Y redlued bridge l adapted to connect the cage with a sucker rod, not shown` the pin 42. in this instance, being an integral part of the bridge. B v this construction of the valve cage 26 the liquid can readily flow upwardly through the cage when the 'alve 2 is open and as soon as the plunger starts on its up stroke the liquid above the valve presses downwardly on the top of the valve 2T so as to quickl)v close the valve. 2T onto its seat 2T.

T he invention is not limited in its broader phases to the exact details of construction described above and shown in the drawings but the invention also includes such changes and modifications as lie within the spirit and scope ot the appended claims.

I claim:

1. In a pump. the combination ot pump tubing. a tubular seat member at the lower end of the pump tubing. a liquid-tight sealing barrel inserted in the seat member, a plunger slidably fitting in the sealing barrel, said plunger being provided intermediate its ends with a c vlindrical valve cage having a valve. a discharge valve cagev secured to the upper end of the plunger and provided with a valve. a tubular member conneeted at its upper end to the seat member and provided adjaeent its lower end with a second seat member. a third seat member fitting in the second seat member, al working barrel connected at its lower end to the first tubular member. a standing valve cage mounted in the working barrel above the third seat member and connected thereto and provided with a valve. and ay conduit connected with the standing valve cage. the plunge-r being provided adjacent its lower end with a tubular member of less internal diameter than the plunger and fitting the conduit.

2. In a pump, the combination of a conduit tube, a plunger comprising an upper plunger tube, a valve for the upper plunger tube. e. valve cage connected with the lower end of the upper plunger tube. a valve for the cage7 and a. lower plunger tube connected at its upper end with the valve cage end having a, tip outside of the conduit tube, there being ports in the lower plunger tube.

3. In a pump, the combination of a conduit tube, a plunger comprising en upper plunger tube, a valve for the upper plunger tube. a valve cage vconnected with the lower end of the upper plunger tube, the `eage,\and a lower plunger tube of larger diameter than the upper plunger tube con-v neetedv at its upper end with the valve cage. 1e

and having a tip at its lower end fitting t outside of the` conduit tube, there'being ports- .to the bore ot the plunger above the upper standing valve when the plunger is on lts up stroke.

5. In a pump, the combination of a conduit, upper and lower standing valves for the conduit, a tubular plunger Surrounding the conduit, and upper and lower valves for the plunger, said` plunger having ports adapted to admit fluid to the bore of the plunger' above Vthe upper Standing valve when the plunger is on its up stroke.

6, lua pump, the combination of a conduit, a valvefor the lower end of the conduit, a valve for the upper end of the conduit, a tubular plunger ISurrounding the conduit, a .valve intermediate of the ends of the plunger, a second valve et the upper end of the plunger, and a barrel to guide the plunger' adapted to be connected with pump tubing.

7. ln a pump, the l.combination of a conduit, upper and lower Standing valves for the conduit, a tubular plunger surrounding the conduit, a valve for the plunger, said plunger having ports adapted to admit fluid to the bore of the plunger above the upper standing valve when the plunger is on its up Stroke, and a reservoir surrounding the plunger and provided with ports in its upper portion. g

8. ln a pump, the Combination of a.l conduit, upper andl lower Standing valves for the conduit, there being ports in the conduit between the upper and lower valves, a tubular plunger surrounding the conduit, and a valve for the plunger, said plunger having ports adapted to admit fluid to the bore of thev plunger above when the plunger is on its up stroke.

9. ln a pump, the combination of a seat member, a reservoir connected with the seat member, a seat member connected with the upper end of the reservoir, a conduit, a plug connected with the conduit and fitting the first named seat member, a barrel seatedin lheseeond seat member, upper and lower at its lower end fitting ther and upper and lower valves for ay valve for4 the upper standing valve.

standing valves for the conduit, aplunger slidebly fitting in the'barreland having its lower end slidably engaging the, conduit, the plunger, there being ports inthe plunger and there being ports in the' reservoir above the plunger ports..

'10. In a pump',the combination of a conduit, upper and lower standing valves for the conduit, a working barrel, a seat member onthe lower end of the working barrel, a seat member-connected with the conduit and engaging the first named Seat'member, a

tubular plunger slidably fitting in the barrel,

and a valve for the plunger, vsaid plunger having ports adapted to admit fluid to the bore of the plunger above the upper stand,

ing valve when the plunger is on its up stroke.

11. In a pump, the combination of a seat member, a reservoir conneetedwith the seat memb'er, a seat member connected with the upper end of the reservoir, a conduit, a plug connected with the conduit and fitting the first named seat member, a barrel seated in the second seat member, upper and lower standing valves for the conduit, a working barrel connected with the lower end of the reservoir, a plunger slidably fitting in the working barrel and having its lower end slidably engaging the conduit, and upper and lower valves 'for the plun er, there being ports in the plunger an there being ports in the reservoir above the plunger ports. v

12. In a pump, the combination of a seat member, an outer sand trap tube connected with the seat member, a plug to fit the seat member, another sand trap tube inside of the outer tube connected with the plug, a second seat member connected with the upper end of the outer tube, a conduit tube connected with the inner sand trap tubeand having ports, an annular seat member slidably fitting the outside of the conduit tube and fitting in the second named seat member, a valve cage connected with the upper endl of the conduit tube, a valve tor the cage, and a coil Spring between the cage and'third named seat member.

13. In a pump, the combination of a seat member, an outer sand trap tube connected with the seat member, a plug to fiti the seat its end ofthe conduit tube, a valve for the cave,

a' coil. Spring between the nage and .third named-,Seat member, and a reservoir Surrounding the conduit tube and connected with the second named seat member and pio vided with a port.

14. In a pump` the combination oi a seat member. an outer sand trap tube connected with the seat member, a plug to lit the'seat member, another sand trap tube inside otI the outer tube connected with the plug. a second eeat member connected with the upper end ot' the outer tube. a conduit tube connected with the inner sand trap tube and having ports, an annular seat member Slidably fitting the outside of' the conduit tube and fitting` in the second named seat member, a valve cage connected with the upper end of' the conduit tube, a valve for the cage, a coil spring between the cage and third named seat member, a barrel mounted in the upper end ot' the reservoir, and a plunger slidubltr fitting in the barrel.

l5. In a pump, the combination ot a seat member. an outer sand trap tube connected with the seat member, a plug to fit the seat member. another sund trap tube inside ot' the outer tube connected with the plug, a second seat member connected with the upper end of the outer tube, a conduit tube connected with the inner sand trap tube and having ports. an annular seat member slidably fitting the outside ot the conduit tube and fitting in the second named seat member, a working barrel connected with the Second, named seat member and having ports` a valve cage connected with the upper end of the conduit tube and fitting in the working barrel. a. valve for the cage. a coil spring between the cage and third named seat member, a reservoir connected at its lower end with the working barrel and provided with ports, and a plunger Slidablv fitting in the working barrel.

1G. ln a pump, the combination of a seat member, an outer sand trap tube connected with the seat men'iber. a plug to fit the. seat member. another sund trap tube. inside of the outer tube connected with 'the plug, a second scat member connected with the upper end ot' `the outer tube, a conduit tube con* nel-ted with the inner sand trap tube and having ports, an annular Seat member Slidablv fitting the outside ot' the conduit tube and fitting in the Second named seat inem bei'. a working barrel connected with the Second named seat member and havingl ports, a

valve cage connected with the upper end or" thx` conduit tube and fitting in the working barrel. a valve for the cage, a coil spring between the cage and third named seat meinber. a reservoir connected at its lower end with the working barrel and provided with por#A a barrel mounted in the upper end ot the reservoirand a plunger slidably fitting 'he working barrel and second named i. tn a pump, the combination ot a resen voir having ports, a seat member connected with the upper end ot the reservoir and pro-- vided with an upwardly and outwardly tapered z-ioat. a seat member coniuufted with the lower end ot the reservoir, a barrel having a scat fitting the first named seat. a plunger slidablv fitting in the barrel, a, sturuling valve inside ot' the reservoir, a seat inenfiber fitting in the second named seat member, and means connecting the third named seat member with the standing valve and admitting fluid to the standing valve.

'15%. in u pump, the combination o'lt a reservoir having ports, a scot member connected with the upper end oi the reservoir and provided with an upwardly and outwardlv tapered seat, a member connected with the lower end ot' the reservoir, a barrel having a seat fitting the first named seat, a plunger .s'lidably fitting in the barrel, a standing valve inside ot' the reservoir, a seat member fitting in the second named seat member. means connecting the third named seat member with the standing valve and admitting fluid to the standing valve, and

a coil spring at the upper end ot' the barrel between the plunger and first nurned Seat member to trictionallvv engage the tiret named seat member.

19. In a pump, the combination ot a pertorated reservoir, a liquid-tight sealing barrel in said reeervoir, a hollow plunger slidably fitting inside ot the sealing barrel, a discharge valve cage Secured to the upper end of the plunger, the plunger being Sulliciently long` so that the discl'iarge vulve cage is above the sealing barrel when the plunger is at the lower end ot' its down Stroke,r e valve 'for said valve cage. a receiving valve cage tor the plunger below the sealing barrel to cause the liquid to move upvi'ard Lv from below the receiving valve cage to above said valve on the downward stroke ot the plunger, and a valve for the receiving valve nage.

lll. ln a pump. the con'ibination of' a lifp nid-tigbt sealing barrel1 u plunger slidablv iitting in the scaling barrel. a discharge "alve cage secured to the plunger and adept ed to be poSitioned 'above the Healing' barrel when the plunger is at the lower e; down stroke. a receiving valve cage for tbe plunger, the portion oi" the plunger below the receiving val-vc cage being oi lar de :mieter than the portion ol" the plunger above,

Said valve cage to carry" iiquid to the receiving vulve cage and meant; outside ol' the plunger to deliver liquid to the enlarged portion of the plunger. i

521. lin a pump. the eonbimition et a scat. member, a reservoir connected with said seat member and provided with ports in its upportion, a plug fitting in the Seat member, a 'valved conduit 'onnccted with the plug and prfwided with ports in its said seatv member and provided with 'ports' in its up er portion, a plug fitting in the i seat mem er, a conduit tube having ports in its lower portion and connected with the plug, a standing valve connected with the conduit tube, a reservoir connected at its lower end 'with the working barrel, a valved tubular plunger slidably fitting in the Working barrel, and means surrounding the plunger to seal the upper end of the reservoir.

23. In a pump, the combination of a seat memberl` means adapted toy connect'the seat member to pump tubing, a solid plug fitting in the seat member, a reservoir provided with inlet ports, a valved conduit having ports communicating with the reservoir and connected with the plug, and a tubular velved plunger slidably fitting the outside of the conduit, said conduit being provided with an external shoulder and saidplunger being provided with an internal shoulder adapted to engage the first named shoulder when the plunger is raised above the end of its normal up stroke.

24. In a pump, the combinationof a seat member, an outer tube connected with the seat member, a plug to t the seat member.y a second seat member connected with tbe upper end ot' the outer tube, a. conduit tube connected with the plug, an annular seat member slidably fitting theoutside of the conduit tube undfitting in the second seat member, a coil spring to hold theannular seat member in the second seet'mernber, and an abutment .on the conduit tube to engage 'the upper end of the spring.

25. ln a pump, the combination` of e seat member, an outer tube connected with the seat member, a plug a second seat member connected with the upper end of the outer tube,l a conduit tube connected with the plug, an annular seat vmember slidably fitting the outside of the conduit tube 'and fitting in the second seat member` a. coil spring to bold thev annularseat member in the second seat member, an abutment on the conduit tube to engage the upper end of the spring, rand a shoulder on the conduit tube adapted to engage the annular seat member when the conduit tube is raised.

26. ln a pump, the combination of a seat member adapted to be connected with pump tubing, a barrel detachably seated in the scat member,'a tubular valved plunger slid ably fitting in the barrel and provided with a shoulder adapted to engage the lower end barrel when the 'plunger 1s raised.,

ot the above the end' oi its normal up stroke, a resto fit the seat "member,

ervoir connected with the barrel and provided With ports below the barrel, avalved conduit extending into the lower portion of the plunger, and means to support the conduit.

27. In a pump, the Acombination .of a working barrel having ports in its lower yeportion, astanding valve 'mounted in theA working barrel above said ports, a reservoir 'surrounding fand spaced from the working barrel end havlng ports, 1neans"closing the lower end ofthe space between the working'v barrel and reservoir, and la valved?` plunger slidably Afitting in the working barrel.

28. In a pump, the combination of a working barrel having ports in itsA lower portion, a standing valve mounted in' the working barrel above said ports, a valved plunger slidably fitting in the working bar rel, a reservoir vsurrounding and spaced from the working barrel and provided with ports in its upper portion, and means surrounding the plunger to seal the upper end of the reservoir. y f y 29. ln a pump, the combination of' e working barrel having ports in its lower ortion, a reservoir surroundingthe working barrel and having ports, a tube extend' ing into the lower portion of the Working barrelrand provided with ports below the level of thereservoir ports, a standing valve on said tube above the orts and itting in the workin barrel, and a valved plunger slidably fitting in the working barrel above the standingvalve. p

30. In a. pump, the combinationof a seat member, a reservoir connected with seid seatvmember and provided with a ort in its upper portion, a valved conduit connected with theseat'member and provided with a port in its` lower portion, a valved tubular plunger slidably engaging the conduitr` and means fitting the plunger and sealing the upper end ofthe reservoir.

3l` n at pump, the combination o -a seat member, e Working barrel connected with said seat member and provided with e port in its upper portion, a conduittuber having ports 'in its lower portion and connected with the seat member, a standing valve connected with the conduit tube, a reservoir connected at its lower end with the working barrel, a valved tubular plunger slidably fitting in the working barrel, and means surrounding the plunger to seai the upper end of the reservoir.

32. In a pump, the combination of a seat member, means adapted to connectl theseat voir and connected with the seat member,

and a tubular valved plunger slidablyffit- -ting the outside of the conduit, said conduit being provided with an external shoulder,

and said plunger being.provided with an internal shoulder adapted to engage the first named shoulder when the plunger is raised above the end of its normal upstroke.

33. In a pump, the combination of a seat member. an outer tube eonneeted with the 'seat member. a second seat member connected with the upper end of the outer tube. a ronduit tube ronnected at its lower end with the first `eat member. an annular seat member slidablv fitting the outside of the conduit tube and fitting in the second seat member, a coil spring` to hold the annular seat member in the second seat member, and an abutment on the conduit tube to engage the upper end of the spring.

34. In a pump, the combination of a seat member. an o uter tube connected with the seat member, a second seat member connected with the upper end of the outer tube, a conduit tube connected with the first seat member. an annular seat member slidablv fitting the outside of the conduit tube and fittingr in the second seat member, a coil spring to hold the annular seat member in the set-ond seat member, an abutment on the conduit tube to engage the upper end of the spring, and a shoulder on the conduit tube adapted to engage the annular seat member, when the. conduit tube is raised.

In a pump, the combination of a reservoir having a vent near its upper end and having a port below the vent, a working barrel'inside of and s aced from the reservoir and provided with a port, 'a valved plunger in the working barrel, a conduit having a port communicating with the interior of the plunger, and a valve for the conduit.

36. In a pump, the combination of a reservoir having a vent near its upper end and having a port below the vent, a working barrel inserted in and withdrawable from the reservoir, a valved plunger slidably fittingI in the working barrel, a seat member connected with the reservoir, a conduit engaging said member and having a port communicating with the interior of the plunger, and a valve for the conduit.

3T. In a pump, the combination of a reservoir having a port only in its upper portion, an upper barrel inserted in and withdrawable Jfrom the reservoir and. spaced there- 1f rom, a lower barrel in. 'the reservoir provided with a port and spaced from the upper barrel closing the upper end of thev n the upper barrel and reser :eti

the upper and .lower barrels.

3&3. in pump, the. combination of a reser voir having a port, a working barrel in the reservoir provided with a port, a Landing valve fitting inside of the lower portion of the working barrel above the port in the 'working barrel, a conduit extending downplunger n. and a valved plunger slidablyv fitting in wardly from the standing valve and provided with a port communicating with the interior of' the working barrel, and a valved plunger slidably fitting in the working bar rel.

39. In a pump, the combination ot' pump tubing, a seat member at the lower end ot the tubing, a liquid tight sealing barrel inserted in the seat member, a plunger slidably fitting at its upper portion in the sealing barrel, said plunger being provided intermediate of its ends with a cylindrical valve cage, a valve in the cage, there being ports in the lower portion of the plunger to admit fiuid to the plunger below the valve, an upper valve cage on the upper end of the plunger to admit fluid from the plunger to the pump tubing, and a reservoir connected with the seat member and having ports therein and surrounding the sealing barrel.

40. In a pump, the combination of a perforated reservoir, a standing valve cage. a perforated conduit extending downwardly from the standing;r valve cage, a seat member engaged by the conduit below the perforations, and means outside of the conduit to deliver liquid to the perforations therein.

41. In a pump, the. combination 0f a perforated reservoir, a standing valve cage, a perforated conduit extending downwardly from the standing valve cage, a seatmernber engaged by the conduit below the perforations, means outside of the conduit to deliver liquid to the perforations, a valved plunger slidably engaging the conduit, said receiving liquid through the conduit from the standing valve cage, and means to seal the upper end of the reservoir.

42. The combination with pump tubing, of a reservoir and pumping mechanism inside ot' said reservoir, a liquid-tight sealing barrel, there being a coupling connecting the reservoir to the pump tubing and containing a liquid sealed seat for the barrel, the reservoir having ports only in its upper portion, and the barrel being frictionally secured within the reservoir below the pump tubing.

43. The combination with pump tubinv, of a reservoir, pumping mechanism inside of' said reservoir`r said reservoir having ports only in its upper port-ions, the pumping ,mechanism having a conduit at its lower portion, there being valve cages for the oonduit and there being ports in the conduit be low the lower valve cage, the reservoir ports vsupplying fiuid to the conduit ports below the lower valve cage.

44. In a pump, the combination of a eonduit having a standin' valve, a tubular plunger fitting the outside of the conduit. and receiving and discharge valves for the l plunger.

45. In a pump, the combination of a reservoir provided onl in its upper portion with a port, a conduit inside of the reservoir provided with a port and having a standing valve, a tubular plunger fitting lthe outside of the conduit, and receiving and discharge valves for the plunger.

'46. 1n a pump, the combination of a liquid-tight sealing barrel, a reservoirconnected with said sealing barrel, and provided with a port in its upper portion, a perforated conduit .inside of the reservoir, means to close the lower end of the reservoir, and a valved tubular plunger fitting the outside of the conduit and Working through'the sealing barrel. i

`417. n 'a pump, the combination of a liquid-tight sealing barrel, a reservoir connected with said sealing barrel and provided with a port in its upper portion, a perforated conduit inside of the reservoir pro- 4 vided with a' standing valve, means to close the lower end of the reservoir, and a valved tubular plunger fitting the outside of the conduit and working through the sealing barrel.

48. In a pump, the combination of a liquid-tight sealing barrel, a tubular seat to the plunger,

member to receive the sealing barrel adapted to be connected to pump tubing, a hollow the sealing barrel, discharge and receiving valve cages secured duit projecting into the plunger, means at the upper end of the conduit fitting the plunger, and an inwardly reduced tubular portion at the lower end of the plunger fitting the conduit.

49. In a pump, the combination of a tubular 'seat coupling member adapted to be con-' nected to pump tubing, a holldw tubular member connected with said coupling member, a seat member at the lower `end of the tubular member, a standing valve cage, a

conduit connected with said cage, a seat memberfitting the last named seat member and shiftably fitting the outside of the conduit, adapted to be connected with the seat member, and a sealing barrel in the coupling member.

50. In a pump, the combination of a tubular member adapted to'be copnected to valves for the cages, a con-' 26l day of March, 1919.

pump tubing, a plunger within the tubular bular member between the plunger and the tubular member, a working barrel fitting Vthe standing valve cage, and a valve in the cage.

51. In a pump, the combination of a tu" bular coupling member adapted to be convnected to pump tubing, a working barrel,

connected to the coupling member, atubular plunger inside the tubular coupling member and slidably fitting in the working barrel,

receiving and discharge valve cages for the plunger barrel, a standing valve cage for the Working a tubular member connecting the coupling member with the working barrel.

52. In a pump, the combination of a seat member, a conduit tube, an annular seat member slidably fitting the outside of the conduit tube and fitting in the first seat member, a coil spring to hold the annular seat member in the first seat member, an abutment on the conduit tube to engage the upper end of the spring, and means tc conneet the first seat member to puinptubing.

. 53. In apump, the combination of a seat member, a conduit'tube, an annular seat member slidably fitting the outside of `the conduit tube and fitting in the first seat member, a coil spring to hold the annular seat member in the lfirst seat member, an abutment on the conduit tube to engage the upperend of the spring, a working barrel connected with the first seat member, a tu-i bular plunger slidably fitting in the working member connected with the working barrel, and sealing means at the upper end'of the tubular 4member between said tubular member and the plunger adapted to be connected to pump tubing.

Signed at Los Angeles,

JOHN

California, this iWitnesses:

GEORGE H. Hines, L. BELLE Wmvnn.

barrel, valves in the cages, and- 

